/Engine/Source/Runtime/SignalProcessing/Public/DSP/ConvolutionAlgorithm.h
InSamples - A 2D array of input deinterleaved audio samples. InSamples[GetNumAudioInputs()][GetNumSamplesInBlock()]  OutSamples - A 2D array of output deinterleaved audio samples. OutSamples[GetNumAudioOutputs()][GetNumSamplesInBlock()]
void ProcessAudioBlock ( const float *const InSamples, float *const OutSamples )